Sunspot drawing of 2011-2-28

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https://doi.org/10.7891/e-manuscripta-156757



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2011-02-28
09:30
Hs 1304.6:9237
https://doi.org/10.7891/e-manuscripta-156757
Observer : Marco Cagnotti
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
19 1 1 A 16.9 178.9
22 6 13 H 25.6 162.8
2 7 14